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ReactionX---Hand-Held-Reaction-Time-Tester

chinn-yyy·ReactionX---Hand-Held-Reaction-Time-Tester·PCB/ReactionX - Hand-Held Reaction Time Tester.kicad_pcb

ReactionX---Hand-Held-Reaction-Time-Tester PCB layout, top view — open source RP2040/RP2350 board by chinn-yyy

About the ReactionX---Hand-Held-Reaction-Time-Tester PCB

ReactionX---Hand-Held-Reaction-Time-Tester is an open source RP2040/RP2350 PCB design by chinn-yyy, published on GitHub. It is a 2-layer board measuring 107.5 × 60 mm, with 14 components from 4 distinct parts.

Its main chip is the XIAO-RP2040-DIP, from the RP2040/RP2350 family. By type, the board carries 8 LEDs, 4 switches, 1 IC and 1 connector.

From the project

Ever wanted to know your reaction time? Well look no further because this is a reaction time tester! Simply click the button and wait for the red light to turn green.

I was doing some math in class and this kid next to me was on this reaction time tester website. I thought to myself, "could I make that in real life?" As soon as I got home I started researching, now I'm here. When you plug it in, it immediately greets you by saying, "ReactionX" and the highscore. Click start to test. Wait about 3-7 seconds before the LEDs turn from red to green. Once they do click either of the big buttons and it shows how long it took. Click early? Nope! When you click early it greets you with the screen of death, "To early!"

ReactionX---Hand-Held-Reaction-Time-Tester, from the project README
From the project README

Main components on the ReactionX---Hand-Held-Reaction-Time-Tester

XIAO-RP2040-DIP

ReactionX---Hand-Held-Reaction-Time-Tester bill of materials (BOM)

14 components, 4 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
XIAO-RP2040-DIP
U1
1
Conn_01x04_Pin
J1
4
SW_Push
SW1, SW2, SW3, SW4
8
SK6812MINI-E
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8

ReactionX---Hand-Held-Reaction-Time-Tester design files

The KiCad project lives in the chinn-yyy/ReactionX---Hand-Held-Reaction-Time-Tester repository on GitHub; these links point at the commit this page was built from.

ReactionX---Hand-Held-Reaction-Time-Tester: common questions

What microcontroller does the ReactionX---Hand-Held-Reaction-Time-Tester use?

The ReactionX---Hand-Held-Reaction-Time-Tester is built around the XIAO-RP2040-DIP, from the RP2040/RP2350 family.

How big is the ReactionX---Hand-Held-Reaction-Time-Tester PCB?

The ReactionX---Hand-Held-Reaction-Time-Tester measures 107.5 × 60 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ReactionX---Hand-Held-Reaction-Time-Tester?

14 components, from 4 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the ReactionX---Hand-Held-Reaction-Time-Tester design files?

From the chinn-yyy/ReactionX---Hand-Held-Reaction-Time-Tester repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the ReactionX---Hand-Held-Reaction-Time-Tester design in my own project?

The repository has no license, so all rights stay with chinn-yyy. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the ReactionX---Hand-Held-Reaction-Time-Tester without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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